JPS6138107B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevator call selection device.

Conventionally, a floor selector has been used to detect elevator calls. This floor selector is an elevator model that is installed in the elevator machine room and moves at a predetermined ratio in synchronization with the movement of the elevator car. It consists of a movable base that is attached to the synchronous movable base and moves in synchronization with the elevator car, and a forward movable base that is attached to the synchronous movable base to detect the floor on which the elevator car should stop next. The forward movable carriage is driven by an electric motor, and at the same time as the car departs, it travels on a floor preceding the synchronous movable carriage, and then detects the floor on which a call is to be stopped. Note that a position detection device and the like corresponding to each floor position are arranged on the frame along the travel of the synchronous movable table and the forward movable table.

Such conventional elevator call selection devices have the following drawbacks.

(A) Because it is a mechanical method, the equipment is complicated and expensive.

(B) Become significantly larger in proportion to the increase in the number of service floors.

(C) Since it is a reduced model, it is necessary to increase the accuracy of placement of position points, etc., and skill is required to adjust the placement.

(D) There are many mechanical contact parts, which requires maintenance, and over time, the moving parts wear out and accuracy deteriorates.

Therefore, in recent years, a call selection device using a microcomputer has been proposed in order to solve the above-mentioned problems.

Such a call selection device includes a memory that stores floor pulses corresponding to stopped floors, and data that is calculated in advance according to the rated speed of the elevator and stores the preceding position in the memory in accordance with the elapsed time after activation. means to select from a table and calculate as a preceding position where deceleration and stop is possible, and if a call is received on a floor corresponding to the above-mentioned preceding position range (compare the number of floor pulses of the floor where the call occurs and the preceding position) However, such a call selection device also has the following drawbacks.

(a) It is necessary to prepare a memory that stores the number of floor pulses that differ depending on the building where the elevator is installed. This makes memory standardization impossible.

(b) It is necessary to change the data table for calculating the preceding position according to the rated speed of the elevator.

(c) Since the above data table needs to be prepared in accordance with the calculation cycle, the memory capacity increases as the calculation cycle becomes smaller and the rated speed increases.

This invention was made to solve the above-mentioned drawbacks of the conventional technology, especially when the rated speed is 90 to 120.
The present invention aims to provide a call selection device that is suitable for elevators with a speed of about m/min, provides optimal selection of operating modes, provides comfortable riding, and has high transportation efficiency.

Embodiments of the present invention will be described below with reference to the drawings.

In Figure 1, 1 to 6 are each floor of the building,
12 is a hoistway in which an elevator car 13 runs. In this hoistway 12, detection elements, that is, first cams 2A to 6A and second cams 2B to 6B, are provided at a predetermined distance in front of the floors in order to face each of the floors 2 to 6 and detect the positions in front of the floors. A first detector 10 and a second detector 11 are installed on the elevator car 13, respectively, which are operated by the first cams 2A to 6A or the second cams 2B to 6B and send out outputs. has been done.

Next, a method for calculating the synchronous floor signal FSY shown in FIG. 2 will be explained first. Here the synchronous floor signal
A detailed explanation of FSY will be omitted, but it should be reset to the correct value at the bottom or top floor.

For example, consider a case where the car 13 is operated upward from the first floor. In this case, when the second detector 11 faces the second cam 2B installed in front of the second floor level, the synchronized floor signal FSY is updated from the first floor to the second floor. Thereafter, every time the second cams 3B to 6B of each floor and the second detector 11 face each other, the synchronous floor signal FSY is 1.
The floors are updated one by one, as shown in Figure 2. In addition,
Cl in the figure is the elevator travel distance curve.

Conventionally, when the elevator car speed exceeds 90 m/mm, the rated speed may not be achieved between the time it starts and the time it stops. This is due to restrictions on the ride comfort of the elevator, and therefore the elevator must be run at a speed lower than the rated speed (hereinafter referred to as partial speed). Whether or not to run at the rated speed is generally determined depending on the number of floors (distance) to be traveled, and the maximum speed is further determined depending on the number of floors. For example, if the rated speed is 90m/mm, partial speed operation is performed when operating on the first floor, and rated speed operation is performed otherwise, and 105m/mm.
In the case of mm, when operating on 2nd floor or less, it is partial speed operation, and when operating on 3rd floor or more, it is rated speed operation.

Incidentally, the distance between each floor varies depending on the structure of the building, and the distance between floors may be long enough to allow the vehicle to travel at the rated speed even when operating on the first floor. However, if the train travels at a partial speed as described above even between such floors, a decrease in transportation efficiency is inevitable. Furthermore, especially in AC elevators that use induction motors as hoisting motors, running at low speeds increases power consumption and is extremely uneconomical, and the motor also generates significant heat.

Therefore, a code for the inter-floor distance (hereinafter referred to as the inter-floor code) is stored in a read-only memory (hereinafter referred to as ROM), and the distance is stored in a read-only memory (hereinafter referred to as ROM) from the floor where the car starts to the floor where the car is scheduled to stop (called the floor code). Detects the distance to the floor) using the inter-floor code,
It is conceivable to select the optimal driving mode.
For example, in an elevator with a rated speed of 105m/mm,
Since the shortest distance that can be traveled at the rated speed is approximately 6000mm, the floor codes are determined as follows.

"00" when the distance between floors is less than 3000mm "01" when the distance between floors is 3000mm or more and less than 6000mm "02" when the distance between floors is 6000mm or more You can select the driving mode.

In other words, when operating on the 1st floor and the floor code is "02", when operating on the 2nd floor and the sum of the floor codes is "02" or more, and when operating on the 3rd floor or higher. Regardless of floor code,
Select full speed operation respectively. Also, select partial speed operation in all cases other than the above.

In general, in thyristor-controlled AC elevators using the actual speed feedback method, when rated speed operation is determined, a full firing command is given to the phase control device to prevent increases in power consumption and heat generation of the motor, and the speed is controlled in an open loop. What is done is done. In addition, in order to smoothly switch from the closed-loop system to the open-loop system and to prevent deterioration of riding comfort, the above-mentioned full firing command is used when the speed command value V _p is small immediately after normal startup. It is preferable to start feeding from V _p = V _ff ) (usually about 1 second after startup). Therefore, the selection of full speed operation described above must be made within 1 second after startup. In other words, partial speed operation must be determined within one second after startup.

Further, if the full firing command once given is canceled midway, the riding comfort will deteriorate, so it is necessary to prevent a change to partial speed operation after the rated speed operation is determined.

For this purpose, immediately after startup, a search is made to see if there is a call on a floor that is capable of partial speed operation (incapable of rated speed operation), and if no call occurs on the floor within 1 second of startup, then Just don't respond to calls on the floor.

Therefore, the preceding floor signal FSA immediately after startup is calculated as follows using the above-mentioned floor code. however,
While the car is stopped, the value of the stopped floor is stored in the FSA. Let us take as an example the case of upward operation from the first floor.

(1) When the floor code between the next floor and the starting floor is "02",
After startup, the FSA is immediately set to the second floor, and thereafter the preceding floor FSA is calculated by the second means described later (see FIG. 3).

(2) In cases other than (1) above, when the sum of the floor codes for the front two floors is ``02'' or more, partial speed operation is possible for traveling to the next floor, so immediately after startup, FSA = 2nd floor. do. If there is no call from the second floor, FSA is activated when the speed command value V _p = V _ff .
= 3rd floor (rated speed operation decided).

Thereafter, the FSA is updated by the second means described later (see Figure 4).

(3) When the sum of the floor codes for the front two floors is less than "02", partial speed operation is possible for traveling to the next floor and the next floor, so immediately after startup, FSA = 2nd floor. If there is no call on the second floor, FSA = 3 at the time of speed command value V _p = 1/2V _ff
Floor. If there is no call on the third floor, FSA = 4 at the time of speed command value V _p = V _ff
(Determine rated speed operation).

Thereafter, the FSA is updated by the second means described later (see Fig. 5).

The above FSA calculation method is referred to as the first method, and the above
Each of (1) to (3) is referred to as (1) 1st floor early notching, (2) 2nd floor early notching, and 3) 3rd floor early notching.

Next, the second means will be explained.

As mentioned above, with the exception of early notching on the first floor, the calls detected during early notching are calls that allow partial speed operation.In other words, the calls on floors where partial speed operation is possible are detected during early notching. can only respond. Therefore, the preceding floors according to the second means are created for detecting calls for floors capable of operating at rated speed.

This will be explained below based on FIG.

Set the inter-floor code to "01" for all floors. Basket 13
When FSA starts from 1st floor 1, as mentioned above, after starting, FSA immediately becomes 2nd floor. At this time, if there is a call to the second floor, the car 13 decelerates and stops at the second floor in response. If there is no call on the second floor, the speed command value V
Update the FSA to the third floor at the time of _p = V _ff . At this stage, calls from the second floor will no longer be answered, the elevator is determined to operate at rated speed, and a full firing command is given to the phase control device. In other words,
At this point, the number of floors where the elevator can decelerate and stop is 3.
~6th floor.

If the call for the third floor occurs before the car 13 rises and passes the first cam 3A on the third floor, at this point
Update FSA on the 4th floor. That is, the first cam 2
If the distance L ₁ in front of the installation floor of A to 6A is the distance required to decelerate to a stop from the rated speed, in the above case,
In order to stop the elevator car at the third floor, the car 13 must be located in front of (below) the first cam 3A. Therefore, the time when the call on the third floor can be answered is before t ₃ in FIG. 4. Similarly, if the fourth floor call does not occur until time t ₄ , the first cam 4A and the first detector 1 on the fourth floor
The preceding floor signal FSA is updated such that 0 is engaged and the FSA is set to the 5th floor.

The problem with the second means described above is at what point to start detecting the first cam. In other words, if you start updating the FSA from the first cam of the next floor, the FSA will be too early in the case of 3rd floor early notching and 2nd floor early notching as shown in Figures 6 and 7. become. Also, when starting from the first cam of one floor after another, in the case of early notching of the third floor, as shown in Fig. 8,
The FSA is too far ahead, and in the first floor early noticing, the FSA is one floor behind the optimal preceding floor, as shown in FIG. Furthermore, starting from the first cam of the floors one after another, Fig. 10 and the first cam
As shown in Figure 1, early notching on the 3rd floor is optimal, but in the case of early notching on the 2nd floor and early notching on the 1st floor, the FSA is lower than the optimal preceding floor. I'll be late.

Therefore, by setting the start time of the second means as follows, the optimal preceding floor FSA can be calculated.

(1) For 1st floor early notching: From the time the first cam passes on the next floor. (2) For 2nd floor early notching: From the time the first cam passes for the next floor. (3) From the time the 3rd floor early notches. In the case of ching: Do this from the time you pass the first cam of each floor one after another. The above-mentioned "next floor", "next floor", and "next floor" judgment can be made by using the synchronous floor signal FSY, but the second cam used to update FSY
The following conditions are required for the first cam used to update the FSA.

(i) Only one second cam is always set between adjacent first cams.

(ii) Only one second cam must be installed between each floor.

Now, L ₁ : Distance in front of the first cam installation floor (=full speed deceleration distance) L ₂ : Distance in front of the second cam installation floor Y: Minimum distance between floors, then from condition (i) L ₁ <L ₂ +Y <L ₁ + Y ... (1) From condition (ii) 0 < L ₂ < Y ... (2) Generally, the minimum inter-floor distance Y is Y = 2500 mm, so from equations (1) and (2) above, the 12th If the first cam setting front distance L ₁ and the second cam setting front distance L ₂ exist within the shaded range in the figure, then the above-mentioned conditions apply.
(i) and (ii) are satisfied. In addition, in an elevator with a rated speed of 105 m/mm, L ₁ = 3000 mm, so from equations (1) and (2),
500mm<L ₂ <2500mm, and it is possible to install the second cam that satisfies conditions (i) and (ii). Note that if the installation position of the second cam is used as a deceleration preparation point during partial speed operation, the number of cams installed can be reduced.

FIG. 13 shows a circuit for executing the first and second calculation means described above. In the same figure,
100 is an electronic computer, and this electronic computer 100 includes a central processing unit (CPU) 101, a converter 102 that converts the output signals of the first detector 10 and the second detector 11 into BCD codes, and a read-only memory (ROM).
103, readable and writable memory (RAM) 10
4 and bus line 10 for address bus, data bus, etc.
5, and the above ROM
103 has the floor code F ₀₁ (1
F ₀₂ (2nd to 3rd floor), F ₀₃ (3rd to 4th floor), F ₀₄ (4th to 5th floor), F ₀₅ (5th to 6th floor)
14b), constants _Vff , etc. used for CPU calculations are stored, and a synchronous floor signal FSY, as shown in FIG.
The preceding floor signal FSA, speed command value V _p, etc. are temporarily stored. and the above synchronization
FSY, preceding floor signal FSA, and speed command value _Vp refer to the interfloor code and signals from the first and second detectors.
It is calculated by the CPU 101, updated and changed, and calls are selected to enable optimal operation of the elevator.

As described above, according to the present invention, it is possible to eliminate the above-mentioned conventional drawbacks a to c, and there are also effects such as being able to select the operation mode of the elevator and optimize the riding comfort.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the positional relationship between the elevator car and the floor in the call selection device of the present invention, Fig. 2 is an operation diagram of the elevator corresponding to Fig. 1, and Figs. 3 to 11 are respectively FIG. 12 is an explanatory diagram for elevator operation showing the relationship between floors, elevator traveling distances, synchronized floor signals, and preceding floor signals according to the device of this invention, and _FIG. Distance in front of the second cam installation floor
₁₃ is a control circuit diagram in the call selection device of this invention, and FIGS. 14a and 14b are ROM used in the control circuit of this invention.
and a RAM data table diagram. 1 to 6...floor, 2A to 6A...first cam (detected element), 2B to 6B...second cam (detected element), 10...first detector, 11...second detection Equipment, 13...basket, 100...electronic computer, 10
1...Central processing unit, 102...Converter, 103
...ROM, 104...RAM.

Claims (1)

[Claims] 1. When the first and second detectors are placed on the elevator car, each floor of the hoistway is placed a certain distance before the respective floor level, and the first and second detectors face each other. First and second detected elements for generating signals from these detectors separately, speed command values V _ff , V _ff /Z immediately after activation
and a first inter-floor code indicating the inter-floor distance where rated speed travel is not possible in each floor operation, and a second inter-floor code indicating the inter-floor distance where rated speed travel is not possible in each floor operation but where rated speed travel is possible in 1-floor skipping operation. 1st floor early notching, 2nd floor early notching, and 3rd floor early notching are calculated and selected based on the third floor code indicating the distance between floors that can be traveled at the rated speed even when operating on each floor. , a first means for setting this as the preceding floor immediately after activation, the second detector calculating an updated synchronized floor signal facing a second detected element of a floor ahead of the current car position; The means is updated each time the first detector passes the first detected element which is located a sufficient distance before decelerating and landing on the floor for each floor, and the synchronized floor signal. A second means for calculating the preceding floor on which rated speed operation is possible based on judgment, immediately after startup, the preceding floor from the first means, and after that, the preceding floor from the second means. means for calculating each preceding floor where deceleration and stop is possible; means for storing the landing call or car call of each floor; and means for calculating the preceding floor where deceleration and stop is possible by this storage means and the means for calculating the preceding floor where deceleration and stop is possible. A call selection device comprising means for selecting.